Loyalty to one

This is my boyfriend's bird, Tango. She is only loyal to him and nobody else. When there are other women in the room, she gets jealous. I'm usually very good with birds, but this one doesn't like me at all, or anyone for that matter. I don't usually even try to take her out of the cage and leave it up to him. Most the time I just leave the door open but it makes it difficult for anyone else to care for her unless my boyfriend is around. According to him, she has a beak of steel. She tries to bite the cage anytime I get near it. Feisty little thing.

On the upside, she does all sorts of tricks. He can flip her on his finger and he's trained her to say things like "bye bye" and "I love you." She can get pretty loud sometimes and needs lots of attention.